正二十烷／海藻酸钠微胶囊的锐孔凝固浴法制备

为改善织物的调温性能，采用锐孔凝固浴法，以正二十烷为芯材，海藻酸钠为壁材，制备相变微胶囊。使用光学显微镜、扫描电镜、傅里叶变换红外光谱分析仪和差示扫描量热仪等测试手段对相变微胶囊的外貌形态和热性能进行分析。得到制备正二十烷／海藻酸钠相变微胶囊的最佳工艺条件为：海藻酸钠的质量分数2?5％，CaCl2的质量分数7?0％，芯材与壁材质量比1∶3。在最优条件下制备的相变微胶囊表面光滑，平均粒径为56?7μm，相变潜热为117?3 J／g，微胶囊的耐热性能良好，明显地改善了织物的调温性能。

Preparation of n-eicosane/sodium alginate phase change microcapsules by hole-coagulation bath

Microcapsules with n?eicosane as the core and sodium alginates as the shell were prepared by hole?coagulation bath. Surface morphologies and thermal properties of n?eicosane/ sodium alginate phase change microcapsules were characterized using optical microscope, scanning electron microscopy, Fourier transform infrared spectroscopy and differential scanning calorimetry. The results indicate that the optimum preparation conditions of n?eicosane/sodium alginate microcapsules as followed. The mass fraction of sodium alginate is 2?5%, the mass fraction of CaCl2 is 7?0% and the mass ratio of core to shell materials is 1∶3. Under the optimal conditions, spherical microcapsules have smooth surfaces. The average diameter of microcapsule is 56?7 μm and the latent heat of phase change is 117?3 J/g. The microcapsules have excellent thermal properties, and thermoregulation performance of the fabric is remarkable improved.